Child Labor and Economic Growth

Internal climate comfort in a living room occupied by human users is controlled by natural ventilation, through at least two external adjustable openings and at least one internal opening, said natural ventilation being determined from a constant physical parameter of said living room and measured parameters relating to wind load and temperature difference to approximate a target air exchange rate for the room. An adjustment parameter (S1, S2) for each external opening is determined to provide air exchange (Qf) to the room on the basis of said target air exchange rate and is modified by application of a set of individual comfort functions (mu) for each opening, taking account at least of outside and inside temperature, air exchange and wind speed and direction. The individual comfort functions (mu) of said set are weighed by fuzzy optimization to produce optimized and substantially equally distributed comfort conditions in positions in the living room adjacent each opening.